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russcc · 04-09-2021, 08:58 AM

Recently bought and installed a set of 51A-5713 rear shackle pins in the '40. These were Ford script, USA. They measured anywhere from .753 to .756 OD, and I believe the variance in OD was what appeared to be galvanize plating. It was so thick on the .756 ones that the nut would not thread on the shackle stud. I have not seen galvanizing on any of the shackle pins I have used before, so this was new to me. The lesson learned here was check the OD on each one, and if needed, take a little of the galvanize off, and by all means, before you install them, run a nut on the shackle threads. It was tough to run a die over the threads once they were in the spring perch.

04-09-2021, 08:58 AM	#1
russcc Senior Member Join Date: May 2010 Posts: 2,871	Shackle pin, heads up Recently bought and installed a set of 51A-5713 rear shackle pins in the '40. These were Ford script, USA. They measured anywhere from .753 to .756 OD, and I believe the variance in OD was what appeared to be galvanize plating. It was so thick on the .756 ones that the nut would not thread on the shackle stud. I have not seen galvanizing on any of the shackle pins I have used before, so this was new to me. The lesson learned here was check the OD on each one, and if needed, take a little of the galvanize off, and by all means, before you install them, run a nut on the shackle threads. It was tough to run a die over the threads once they were in the spring perch.